var TIN_CTL = 'ctl';
var TIN_ACT = 'act';

$(function(){
	$('#search_key').focusin(function(){
		$(this).val('');
	}).focusout(function(){
		if($(this).val()==""){ $(this).val('请输入关键词'); }
	});
});

function DrawImage(ImgD,iwidth,iheight){
    var image=new Image();
    image.src=ImgD.src;
    if(image.width>0 && image.height>0){
      if(image.width/image.height>= iwidth/iheight){
          if(image.width>iwidth){
              ImgD.width=iwidth;
              ImgD.height=(image.height*iwidth)/image.width;
          }else{
              ImgD.width=image.width;
              ImgD.height=image.height;
          }
      }else{
          if(image.height>iheight){
              ImgD.height=iheight;
              ImgD.width=(image.width*iheight)/image.height;
          }else{
              ImgD.width=image.width;
              ImgD.height=image.height;
          }
      }
    }
}
function goBodyTop(tig, timer){
	$('html,body').animate({scrollTop:$(tig).offset().top}, timer);
}